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Aimed at the disadvantages of traditional monitoring system, an underground pipeline security early warning system based on wireless sensor network was designed. The system employed a dynamic cluster head election of the clustered network structure, taking CC2530 as the core of wireless sensor nodes. The sensor nodes stored and analyzed the data, using a new type of optical fiber temperature sensor...
A concatenated LSTM (Long Short-Term Memory) architecture for CHP (combined heat and power) heat load forecasting was presented. Firstly, input data was normalized and separated into historical climate and heat load data. Then feed the separated data into two LSTM neural networks. Finally, the two LSTM models were concatenated as inputs to another LSTM model followed by two dense layers. Relu function...
In this paper, a sensorless admittance control scheme is developed for robot manipulators in the presence of input saturation by employing neural networks. To deal with system uncertainties, the radial basis function neural network (RBFNN) is integrated into control design. In order to deal with input saturation, a compensator is applied to handle this problem. To interact with the environment, admittance...
The purpose is to locate the fault of coal mine drainage system quickly and accurately, and then establish a fault diagnosis of the underground drainage fuzzy Petri net system model based on BP optimization algorithm. On the basis of the traditional fuzzy Petri net model, the BP optimization algorithm with momentum factor is added to improve the accuracy of the algorithm, the S-type continuous functions...
In this paper, a numerical prediction method called addition-subtraction frequency (ASF) method with 3 inputs and full traversal is presented, in order to predict USA future wars. In the last few years, several wars around the world that were all related to the United States of America burst out, such as War in Afghanistan, Iraq War, War in North-West Pakistan and Libyan Civil War, which caused a...
In the process of comprehensive evaluation for guided and control law performance of aircraft, index weight value directly affects the evaluation result. In this article, the multiple indexes system for guided and control law performance of aircraft is established. An optimized method is put forward for weight determination of indexes, which is based on analytic hierarchy process and entropy weight...
In order to remove the false edge points extracted by the Canny operator in etched character recognition, a method based on the simplified neighborhood feature and AdaBoost algorithm was proposed. In conventional neighborhood feature, canny edge points are taken as the center and neighborhood pixels are extracted as the feature. However, the dimension of the neighborhood feature rises with the square...
There is the high surge current emerging when the asynchronous traction motor is replaced by PMSM with power down-rejoining on. The high back EMF voltage exists when traction PMSM is passing the switching phase insulator. The reason is due to the constant value existence of the permanent magnet. Aiming at above mentioned problems, this paper analyses the reasons of causing transient surge current...
Aiming at the integrated navigation system with model errors, the model errors is assumed as a process noise for Gaussian white noise to process in Kalman filtering, thus causing larger state estimation error of nonlinear filtering system and even divergent. This paper presents a nonlinear model predictive particle filtering method considers the model error of real-time estimation, and then corrects...
In this paper, the research on the stabilization of time-varying linear (TVL) system is conducted with pseudo division-by-zero (PDBZ) phenomenon shown. We not only adopt zeroing dynamics (also called Zhang dynamics, ZD) method to design ZD stabilization controller, but also adopt zeroing-gradient (also called Zhang-gradient, ZG) method to design ZG stabilization controller. Through numerical experiments,...
The ideal Gaussian pulse can be more convenient to simulate the excitation of electromagnetic waves and its propagation characteristics, but the pulse and the actual local discharge current waveform is not exactly the same. At the same time, most of the previous research contents have adopted the simplified GIS simulation model, which does not take into account the influence of the arc of the basin...
In the field of video-based fire detection, traditional fire color models have poor adaptability and susceptibleness to environmental interference. As fire can be divided into fire core, inner fire and outer fire layers depending on its temperature and color, a new fire detection model based on dispersion of fire color components has been proposed by the author. In order to further reduce false alarm,...
This paper is concerned with the adaptive backstepping quantized control problem for a class of output-constrained nonlinear systems. Based on a new transformation of the control signal, the system does not require any assumptions. Firstly, the hysteretic quantizer is decomposed into a linear part and a nonlinear part. Then, by constructing an appropriate Lyapunov function and choosing some proper...
Aiming at the problems of PWM rectifier control strategy of sliding mode control, steady state performance weak Hamiltonian control dynamic tracking performance is poor, this paper proposed a coordinated compound control, feedback linearization controller and sliding mode controller Hamiltonian system is obtained, and the design of a coordinated control strategy. In order to verify the accuracy of...
The finite-time stabilization for a class of stochastic nonlinear systems with Markovian switching and uncertain transition probabilities is studied in this paper. Different from existing results for stochastic systems with Markovian switching which are all about strong solutions, the results in this paper are about weak solutions. Firstly, we develop Lyapunov theorems for the existence of a global...
This paper deals with the problem of reachable set bounding for interval time-varying delay system with disturbances. A generalized reciprocally convex combination lemma and a new Lyapunov-Krasovskii functional (LKF) are given to obtain the delay-dependent criterion. The reachable set of time-varying delay systems with bounded peak disturbances is contained in the ellipsoid base this result. Meanwhile,...
This paper considers the problem of global output feedback stabilization by virtue of a reduced-order observer for a class of switched nonlinear systems with time-varying control gains under arbitrary switching. Firstly, a set of coordinate transformations is used to introduce a scaling gain. Then, state feedback controllers are designed for the individual subsystems of transformed switched system,...
In this paper, the bipartite consensus problems are investigated for multi-agent systems with double-integrator dynamics and antagonistic interactions. We consider bipartite consensus under the given protocol, which means that the absolute value of the position is the same when all the velocities of agents are 0, but the sign may be opposite. When there are no delays, the necessary and sufficient...
This paper investigated the problem of finite-time L∞ controller design for time-delay nonlinear switched systems. Our purpose is to construct appropriate conditions to guarantee the switched systems are not only finite-time bounded, but also have the L∞ disturbance rejection performance. Based on the multiple Lyapunov functions and average dwell-time method, the closed-loop systems have a specified...
In many industrial applications, actuator redundancy is used to ensure the flexibility and safety of the system. The control allocation algorithm manages the control signals among the redundant actuators. In comparison with the other existing control allocation methods, the pseudo inverse approach can give the exact answer, has a lower computational cost, and is also simpler to realize. The only defect...
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